code: def analyze(context=None, results=None):
      pass
  
file_path: catalyst/catalyst/examples/simple_universe.py
imports: from datetime import timedelta
  import numpy
  import pandas
  from catalyst import run_algorithm
  from catalyst.api import symbols
  from catalyst.exchange.utils.exchange_utils import get_exchange_symbols
label_desc: Use image node_id 3 for calling a global function with example usage: analyze(context, results) without return types